without regexps
mondsk: WARNING: priority 1: / is BLANKED full (threshold is 3%)
mondsk: WARNING: priority 1: /boot is BLANKED full (threshold is 6%)

with regexps
mondsk: WARNING: priority 1: / is BLANKED full (threshold is 3%)
mondsk: WARNING: priority 1: /boot is BLANKED full (threshold is 3%)

all done